Late flower diagnosing week 12 total week 7 in flower

Hey guys I'm back with some questions about my dwc garden....
1. Does anyone have a decent chart for diagnosing plant issues? I'll post pictures of what I discovered in the garden.

2. Does anyone ever notice an upswing in pH during flower? (specifically towards the end of flower - dwc only)

3. Also if anyone can help by sharing an example of their autoflower nutrient feeding that would be great! I plan on running some experiments with different nutrient lines to see what works for me. My only question is how strong should my solution be if water from the tap starts out at 200ppm?

I know she's almost ready for harvest but I just want some notes and tips for future grows. TIA for any help!
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Not a pH problem impacting absorption, then. Yeah I would do some cal mag
Thank you! I was beginning to wonder if it's just that lol I can't say the same for other plants haha those ones are much younger and showing the same symptoms and they're pH swings way too high for my liking. But that's why I'll be doing some experiments on the next run to really try n figure out what works best for my environment
 
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